Try adding in the borders first, i used the below in that example in the screenshot

#where {

border-right: 1px solid black;

}

#when {

border-left: 1px solid black;

border-right: 1px solid black;

}

#who {

border-left: 1px solid black;

}

You can add/remove padding to each of the above, but you might need to adjust the % width of the columns used to create the 3 bar layout using the below code. In the screenshot i used the below based on the code on your page